Jennifer Linder
Jul. 06, 2012
What's Your IQ on SPF?
A look at the science of sunscreen: how it intercepts the sun's rays, whether it blocks vitamin D production, and what SPF really means.
sunscreen, uva, uvb, ultraviolet radiation, sun block, suntan lotion, sun tan lotion, nanoparticles, skin cancer, melanoma, vitamin d, summer, sunshine
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Michael Pollan Talks Plants and Food
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